"....when in fact it should be no depreciation"

Err... in fact, per Pub 463, there IS depreciation: 

Rate of Depreciation Allowed in Standard Mileage
Rate
Year(s) Depreciation Rate per Mile
2024 0.30
2023 0.28
2021–2022 0.26
2020 0.27
2019 0.26
2017–2018 0.25
2015–2016 0.24
2014 0.22
2012–2013 0.23
2011 0.22
2010 0.23
2008–2009 0.21
2007 0.19
2005–2006 0.17
2003–2004 0.16
2001–2002 0.15
2000 0.14